Radioactive dating used for


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There are several common radioactive isotopes that are used for dating rocks, artifacts and fossils. The most common is U-235. U-235 is found in many igneous rocks, soil and sediment. U-235 decays to Pb-207 with a half-life of 704 million years. Due to its long half-life, U-235 is the best isotope for radioactive dating, particularly of older fossils and rocks.

Different methods of radiometric dating vary in the timescale over which they are accurate and the materials to which they can be applied.


Radioactive dating used for

Radioactive dating used for